FAIR VALUE MEASUREMENTS - Financial Instruments Disclosed, But Not Carried, at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Fair Value, Option, Quantitative Disclosures [Line Items]
Fixed maturities, held to maturity, at amortized cost	$ 405,041	$ 443,400
Fixed maturities, held to maturity, fair value	400,790	436,751
Federal Home Loan Bank advances	66,380	66,380
Federal Home Loan Bank advances, fair value	66,000	66,000
Reported Value Measurement
Fair Value, Option, Quantitative Disclosures [Line Items]
Notes payable, fair value	1,316,000	1,315,000
Estimate of Fair Value Measurement
Fair Value, Option, Quantitative Disclosures [Line Items]
Notes payable, fair value	$ 1,283,000	$ 1,247,000